Photos: Iowa Hawkeyes football coach Kirk Ferentz

Iowa head coach Kirk Ferentz applauds with former Iowa coach Hayden Fry prior to kickoff between the Hawkeyes and Northern Iowa in 2009 in Iowa City. Fry was an honorary team captain for the season opener. Register file photo

Iowa head coach Kirk Ferentz yells at a referee during the 1st quarter Saturday November 11,2006 at Kinnick Stadium, in Iowa City, Iowa. Iowa lost 24-21. Matthew Holst/Press-Citizen

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Iowa Head Coach Kirk Ferentz argues with UNI Head coach Mark Farley after a game on Sept. 17, 2005 at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa Head coach Kirk Ferentz talks with a referee during the Northwestern game, Saturday November 4, 2006 at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa Head Coach Kirk Ferentz watches the 4th quarter, Saturday November 18,2006 at the Metrodome in Minneapolis, Minn. Iowa lost 34-24. Matthew Holst/Iowa City Press-Citizen

Iowa coach Kirk Ferentz yells at referees after a call in the 1st quarter, Saturday November 18,2006 at the Metrodome in Minneapolis, Minn. Matthew Holst/Iowa City Press-Citizen

Iowa's Kirk Ferentz yells at a referee after a touchdown was called back due to an ineligible receiver in the 2nd quarter, of the Alamo Bowl Saturday December 30, 2006 in San Antonio, Texas. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz talks with Mike Klinkenborg (40) on the way to the team portrait following the University of Iowa Football Media Day Monday, August 6, 2007, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers reporters questions during a press conference at the University of Iowa Football Media Day Monday, August 6, 2007, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

University of Iowa head football coach Kirk Ferentz, right, walks down the stairs of Kinnick Stadium with players Jake Christensen, left, and Tom Busch on their way to a team photo during the team's media day on Monday, Aug. 6, 2007. Matthew Holst/Iowa City Press-Citizen

University of Iowa head football coach Kirk Ferentz talks to a reporter during the team's media day at the Kenyon Football Practice Facility on Monday, Aug. 6, 2007. Dan Williamson/Iowa City Press-Citizen

Iowa Head Football Coach Kirk Ferentz speaks to reporters during a news conference as Iowa Athletics Director Gary Barta looks on, Friday August 24, 2007 at the Hayden Fry Football Complex, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa Head Football Coach Kirk Ferentz speaks to reporters during a post news conference interview, Friday August 24, 2007 at the Hayden Fry Football Complex, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head football coach Kirk Ferentz shakes hands with cancer survivor Alex Moen, after signing a football for him Wednesday August 29, 2007 at the Kirk Ferentz Football Kick-Off Luncheon, which benefited the UI Children's Hospital, at the University Athletic Club, in Iowa City, Iowa. Moen spoke during the event about his stay at the Children's Hospital following a brain surgery. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz encourages his team from the sideline during a goalline stand in the second overtime on Sept. 9, 2006, in Syracuse, New York. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz watches from the sidelines during the last few seconds of his team's game against Iowa State on Saturday, Sept. 15, 2007, at Jack Trice Stadium in Ames. Iowa City Press-Citizen

PC photo by Dan Williamson. 9-22-07. Iowa coach Kirk Ferentz, left, argues with an official after a controversial ruling during the second quarter of their game on Saturday, Sept. 22, 2007, in Madison, Wisc. Dan Williamson/Iowa City Press-Citizen

Iowa coach Kirk Ferentz, left, argues with an official after a controversial ruling during the second quarter of their game on Saturday, Sept. 22, 2007, in Madison, Wis. Dan Williamson/Iowa City Press-Citizen

Iowa head football coach Kirk Ferentz, left, stands with the team as they wait to run onto the field at Camp Randall Stadium for their game against Wisconsin on Saturday, Sept. 22, 2007, in Madison, Wis. Wisconsin won the game, 17-13. Dan Williamson/Iowa City Press-Citizen

Iowa head football coach Kirk Ferentz answers reporters' questions during a news conference following his team's 17-13 loss to Wisconsin on Saturday, Sept. 22, 2007, at Camp Randall Stadium in Madison, Wis. Dan Williamson/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz surveys the stadium before the team takes the field against Penn State on Saturday, Oct. 6, 2007, at Beaver Stadium in State College, Pa. Iowa lost the game 27-7. Matthew Holst/Iowa City Press-Citizen

Penn State coach Joe Paterno, left, shakes hands with Iowa coach Kirk Ferentz shake hands after their game on Saturday, Oct. 6, 2007, at Beaver Stadium in State College, Pa. Iowa lost the game 27-7. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz screams at an official in the third quarter, Saturday October 13, 2007, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz lines up with his players before taking the field against Illinois, Saturday October 13, 2007, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz talks with an official during the second quarter of the game against Purdue at Ross-Ade Stadium in West Lafayette, Ind., on Oct. 20, 2007. Hannah van Zutphen-Kann/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz rips off his headphones while yelling at a referee in the second quarter, Saturday October 27, 2007, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head football coach Kirk Ferentz reacts after the Hawkeyes were called for pass interference during the third quarter of their game against Northwestern on Saturday, Nov. 3, 2007, at Ryan Field in Evanston, Ill. Iowa won the game 28-17. Dan Williamson/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz yells at an officials in the third quarter, Saturday November 17, 2007, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz reacts to an officials call in the third quarter, Saturday November 17, 2007, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz waits to sit down for the team portrait at the team's media day, Monday, August 4, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa football coach Kirk Ferentz speaks at a press conference at Kinnick Stadium on Football Media Day in Iowa City, Monday, August 4, 2008. John Richard/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers reporters questions following a press conference at the team's media day, Monday, August 4, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa football coach Kirk Ferentz speaks at a press conference at Kinnick Stadium on Football Media Day in Iowa City, Monday, August 4, 2008. John Richard/Iowa City Press-Citizen

Iowa football coach Kirk Ferentz speaks at a press conference at Kinnick Stadium on Football Media Day in Iowa City, Monday, August 4, 2008. John Richard/Iowa City Press-Citizen

Iowa football coach Kirk Ferentz speaks at a press conference at Kinnick Stadium on Football Media Day in Iowa City, Monday, August 4, 2008. John Richard/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz speaks during a press conference at the team's media day, Monday, August 4, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz speaks during a press conference at the team's media day, Monday, August 4, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz speaks during a press conference at the team's media day, Monday, August 4, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz speaks during a press conference at the team's media day, Monday, August 4, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz looks on during a practice open to the media, Thursday, August 7, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa football head coach Kirk Ferentz shakes hands with the officials before the annual Kid's Day Scrimmage at Kinnick Stadium, Saturday, August 16, 2008. John Richard/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz shakes hands with Maine coaches after the game, Saturday Aug. 30, 2008, at Kinnick Stadium, in Iowa City, Iowa. Iowa won 46-3. Matthew Holst

Iowa head coach Kirk Ferentz waits with his team before taking the field against Maine, Saturday Aug. 30, 2008, at Kinnick Stadium, in Iowa City, Iowa. Iowa won 46-3. Matthew Holst/Iowa City Press-Citizen

Iowa head football coach Kirk Ferentz argues with line judge Walt Coleman about a penalty called against Iowa during the second quarter of the Hawkeyes' game against Iowa State on Saturday, Sept. 13, 2008, at Kinnick Stadium in Iowa City. Dan Williamson/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz hugs Pittsburgh offensive line coach Tony Wise after the game, Saturday Sept. 20, 2008, at Heinz Field, in Pittsburgh, Pa. Matthew Holst/Iowa City Press-Citizen

Kirk Ferentz stands in the tunnel with his team before taking the field against Pittsburgh, Saturday Sept. 20, 2008, at Heinz Field, in Pittsburgh, Pa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz talks with an official over a disputed call in the fourth quarter, Saturday Sept. 27, 2008, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa coaches Kirk Ferentz, left, and Erik Campbell yell instructions to the team during at time out in the third quarter of their game against Michigan State on Saturday, Oct. 5, 2008, at Spartan Stadium in East Lansing, Mich. Michigan State won the game 16-13. Dan Williamson/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz, left, watches from the sidelines as Michigan State's Todd Boleski pushes Iowa's Jewel Hampton out of bounds during the third quarter of their game Saturday, Oct. 5, 2008, at Spartan Stadium in East Lansing, Mich. Michigan State won the game 16-13. Dan Williamson/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz stands with his players before taking the field to face Indiana, Saturday Oct.. 11, 2008, at Memorial Stadium, in Bloomington, Ind. Matthew Holst/Iowa City Press-Citizen

University of Iowa football coach Kirk Ferentz, left, enters the courtroom before a hearing for former Iowa football players Abe Satterfield and Cedric Everson on Thursday, Oct. 23, 2008, at the Johnson County District Courthouse in Iowa City. Brian Ray

Judge Patrick Grady, left, swears in University of Iowa football coach Kirk Ferentz during a pretrial hearing for former Iowa football players Abe Satterfield and Cedric Everson on Thursday, Oct. 23, 2008, at the Johnson County District Courthouse in Iowa City. Brian Ray

Iowa head coach Kirk Ferentz tries to fire up his players after Illinois scored in the first quarter, Saturday Nov. 1, 2008, at Memorial Stadium, in Champaign, Ill. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz argues with an official about a pass interference call in the second quarter against Penn State, Saturday Nov. 8, 2008, at Kinnick Stadium, in Iowa City, Iowa. Iowa won 24-23. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz argues with an official about a pass interference call in the second quarter against Penn State, Saturday Nov. 8, 2008, at Kinnick Stadium, in Iowa City, Iowa. Iowa won 24-23. Matthew Holst/Iowa City Press-Citizen

Security helps Iowa head coach Kirk Ferentz off the field after the game against Penn State at Kinnick Stadium on Saturday, Nov. 8, 2008, in Iowa City. Iowa City Press-Citizen file photo

Iowa head coach Kirk Ferentz yells from the sideline in the second quarter against Purdue, Saturday Nov. 15, 2008, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz and defensive line coach Rick Kaczenski congratulate Mitch King after forcing a fumble in the third quarter against Purdue, Saturday Nov. 15, 2008, at Kinnick Stadium, in Iowa City, Iowa. Iowa won 22-17. Matthew Holst/Iowa City Press-Citizen

Iowa football head coach Kirk Ferentz speaks during a press-conference at the Jacobson Building in Iowa City on Wednesday, March. 25, 2009. John Richard/Iowa City Press-Citizen

Iowa football head coach Kirk Ferentz speaks during a press-conference at the Jacobson Building in Iowa City on Wednesday, March. 25, 2009. John Richard/Iowa City Press-Citizen

Iowa football head coach Kirk Ferentz speaks during a press-conference at the Jacobson Building in Iowa City on Wednesday, March. 25, 2009. John Richard/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz watches his players during practice at the Kenyon Practice Field in Iowa City on Wednesday, March 25, 2009. John Richard/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers questions during Iowa Media Day, Friday, August 7, 2009, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers questions during Iowa Media Day, Friday, August 7, 2009, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers questions during Iowa Media Day, Friday, August 7, 2009, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers questions during Iowa Media Day, Friday, August 7, 2009, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz walks up the stairs leaving the field after Iowa Media Day, Friday, August 7, 2009, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz answers questions during Iowa Media Day, Friday, August 7, 2009, at Kinnick Stadium, in Iowa City, Iowa. Matthew Holst/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz check the scoreboard during the Hawkeyes game against the Wolverines on Saturday, November 5, 2011 in Iowa City. Benjamin Roberts/Iowa City Press-Citizen

Hawkeye head coach Kirk Ferentz watches his squad during an open practice to the media at Kinnick Stadium on Wednesday afternoon, March 29, 2012. Benjamin Roberts/Iowa City Press-Citizen

Iowa head coach Kirk Ferentz speaks at Carver-Hawkeye Arena during Iowa football media day on Monday, Aug. 6, 2012. David Scrivner/Iowa City Press-Citizen

Kirk Ferentz Iowa City Press-Citizen

Head coach Kirk Ferentz during Hawkeye Football open practice day at Kinnick Stadium on Saturday, August 18, 2012. Benjamin Roberts/Iowa City Press-Citizen

Northern Iowa football coach Mark Farley, left, and Iowa coach Kirk Ferentz spek prior to the game on Sept. 15, 2012, at Kinnick Stadium in Iowa City. HAWKCENTRAL.COM FILE PHOTO

Iowa coach Kirk Ferentz addresses the media during the Big Ten Football Media Say on Monday at Hilton Chicago. USA TODAY Sports

Iowa head coach Kirk Ferentz talks to the media during the Big Ten Football Media Day in Chicago, Monday, July 28, 2014. (AP Photo/Paul Beaty) PAUL BEATY, AP

Iowa head football coach Kirk Ferentz talks with coaches during team's spring game at Kinnick Stadium in Iowa City, IA on Saturday afternoon, April 26, 2014. Benjamin Roberts / Iowa City Press-Citizen

Iowa coach Kirk Ferentz looks up at the big screen to watch a replay against LSU in the Outback Bowl on Wednesday, Jan. 1, 2014, in Tampa, Florida. (Bryon Houlgrave/The Register) Bryon Houlgrave/The Register